Question

Estimate the sum or difference.

15 2/15 - 15 1/20

A 2
B 1
C 0

Answer 1

Are you sure of those answers?
The total should be about 30

Answer 2

^^

Answer 3

yes I am sure

Answer 4

Then I guess you must estimate the diffference (that "+" in the equation fooled me)

Answer 5

hold on sorry

Answer 6

Estimate 15 2/15 - 15 1/20

Answer 7

That is probably what it is ^^

Answer 8

Well the 15's cancel out and you must now solve
2/15 - 1/20
which easily rounds to zero

Answer 9

You could get an exact answer without a clculator:
2/15 = 8/60
1/20 = 3/60
8/60 -3/60 = 5/60
5/60 = 1/12